<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello World</title>
    <script src="./vue.js"></script>
</head>
<body>
    <div id="app">{{content}}</div>
    <script>
        // var dom = document.getElementById('app');
        // dom.innerHTML = 'hello world'
        //
        // setTimeout(function () {
        //     dom.innerHTML = 'bye world'
        // },2000)

        var app = new Vue({
            el: '#app',
            data: {
                content: 'hello world -vue'
            }
        });

        setTimeout(function () {
            app.$data.content = 'bye world -vue'
        },2000)
    </script>
</body>
</html>